Metal seal comprising a textured outer sealing layer

a metal seal and outer sealing technology, applied in the direction of engine seals, flanged joints, pipe joints, etc., can solve the problems of limited leakage risk, inability to solve caulking problems on its part, and inducing leakage, so as to facilitate the plastic flow of material, wide sealing run, and reduce the effect of bearing area ratio

US20220057029A1Pending Publication Date: 2022-02-24COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2022-02-24

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Abstract

A static metal seal comprising an outer sealing layer, wherein the outer sealing layer comprises a textured surface that is configured to come into contact with the surfaces that are to be sealed, the textured surface comprising a network of depressions spaced apart from one another on the textured surface, wherein the depressions are blind, do not pass all the way through the outer sealing layer, and do not communicate with one another.
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Description

TECHNICAL FIELD

[0001] The present invention relates to the field of static metal seals.

[0002] It is applicable in various industrial fields, and typically for the production of the sealing between two flanges.

[0003] Thus, the invention relates to a static metal seal comprising an outer sealing layer having a textured surface.PRIOR ART

[0004] The metal seal is a technology widely used in many critical sealing applications, typically in situations where one or more of the following four conditions are found: ultrahigh vacuum, high pressure, chemically aggressive liquid, high temperature.

[0005] As for any seal, it is desired to jointly obtain: a high level of sealing; a lowest possible compressive force; a largest possible sealing run.

[0006] Resolving this problem is currently feasible, subject to having, in contact with the flanges, a highly ductile sealing material, such as for example silver.

[0007] Thus, an example of metal seal is described in French patent application FR 2 151 186 A1. Acc...

Examples

first embodiment

[0043]FIG. 3 illustrates a detailed view, according to A, of FIG. 2 to present the textured surface, with circular-shaped depressions,

[0044]FIG. 4 is a partial sectional view according to C-C of FIG. 3,

second embodiment

[0045]FIG. 5 illustrates a detailed view, according to A, of FIG. 2 to present the textured surface, with oblong-shaped depressions,

[0046]FIG. 6 is a graph illustrating the interest of the texturing by presenting the evolution of the sealing G, expressed in Pa·m3 / s, for various surface texturings depending on the seating pressure PrA, expressed in MPa, and

[0047]FIGS. 7 to 19 illustrate, in partial section, miscellaneous examples of metal seals in accordance with the invention, FIGS. 11, 15, 16 and 19 presenting detailed sectional views of depressions.

[0048]In all of these figures, identical references may designate identical or similar elements.

[0049]In addition, the various portions shown in the figures are not necessarily according to a uniform scale, to make the figures more readable.